Wander, get the name wrong and colour up (7)
I believe the answer is:
meander
'wander' is the definition.
(I've seen this in another clue)
'the name wrong and colour up' is the wordplay.
'wrong' indicates an anagram.
'and' says to put letters next to each other.
'colour' becomes 'red' (red is a kind of colour).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'red' written backwards gives 'der'.
'name' anagrammed gives 'mean'.
'mean'+'der'='MEANDER'
'get' acts as a link.
(Other definitions for meander that I've seen before include "Wander aimlessly like a stream" , "keep dodging the point" , "Roam aimlessly around" , "Renamed in order to wander in leisurely way" , "Wandering direction" .)